Collapsible drawing board



' Apr. 24, 1923.

' L. L. UEERWARTH COLLAPSIBLE DRAWING BOARD Filed Nov. 14, 1921 PatentedApr 2d, 192?.

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Application filed November 1 1-. .1921. same no. 514,974.

in the combinations, COIlStPllCtlOTlfi-J, and arrangements hereindescribed and claimed.

iincbject of my invention is to provide a collapsible. (brewing; board.:which comprises a minimum. number of parts and which can be quickly andreadily assembled or disasseinbled;

.ihwfurther object ot i'ny invention is to provide a device of thei typedescribed in which the. parts are 1 held rigidly together whenassembled.

A! further object of my invention is to provide a device of thecharacter described inwhich the partspthereof when disassembled can bepacked. in a small space for trai'isportation.

11 turtherohjectpt my invention is to provide a device of the typedescribed which siniple in constriiiction and is not likely to easilyget out of order.

uother oh'jects'and advantageswill appear in the followingspecification, and the novel features of the inventionavill be partiedlarly pointed out in the a ipended. claims.

l\ly invention is illustrated in the accompanying drawings, foriiaingpart of this a'ppilication, in Whichllirgrure 1 is a perspective View ofthe assembled hoard,

Figure 2 is a perspective view of the as seuibletl .hoarjd showing theunderside thereof,

Figure 3 is a perspective view of the dis assembled board, the partsthereof being packed in a small space, and

Figure 4 is an. enlarged sectional. detail of a portion of the device.

In carrying out my invention, I provide two cleats 1-1, each of thecleats having a recess 2 therein. The recess 2 extends sub stantiallythe entire length of the cleat and has beveled end Walls 3. The portionsl oi? the cleat 1 at each end of the recess 2 are provided withlongitudinally extending grooves 5 therein. These grooves are angu larin cross section, the lower surfaces there of lying in the same plane asthe recess 2. it will thus be seen that these portions t are providedwith walls that taper inwardly from the top thereof. The top 01 theboard (5 is composed of three sections of material, 7, 8 and 9. Thesections 7 and 9 are identical with respect to each other, each beingprovided with recesses 10 therein. The walls of these recesses aretapered inwardly from the top thereof and are adapted to abut the wallsoi? the portions l; 'l Vhen the sections 7 and 9 are so disposed thatthe pertions i project into the recesses 10, it will be apparent thatthese sections cannot be moved vertically with respect to the cleats 1..The edges 11 and 12 of the sections 7 and 9 are molded so that theytaper outwardly from the top thereof. The center section 8 has its edges13 and 1 1 molded so as to conform. with. the edges" 11 and 12,respectively, thus holding the sections 7 and 9 securely in place. litwill. be noted that the sections 7 and 9 are prevented from lateralmovement with respect to the cleats 1 by means of the portions 41-. Thesection 8 is also prevented. from lateral movement by pins "15 which arecarried by the cleats 1 and which project into openings in the underside the section. As clearly shown inFigure'et, the section 8 has ametal socket16 centrally dis posed therein. The socket 16 is adapted toreceive a bolt 17 which in turn pivotally secures in place a metal strip18 for a purpose now to be described. The cleats 1 are provided on theinner sides thereof with curved grooves 19 into which the ends of themetal strip 16 are adapted to project. It will thus be apparent that thestrip 18 securely holds the section 8 in place.

From the foregoing description of the various parts oi? the device, theoperation thereof may be readily understood. Inassenibhngr the device,the sections 7 and 9 ter can be inserted between. the sections 7 and- 9.The strip is then rotated so that the ends thereof enter the curvedgrooves 19. lit will be apparent that as the strip 18 is rotated firmlylocked in place.

into parallelism, the section 8 will be more The board is now assembledand can be used in the same manner as an ordinary drawing board and isjust as rigid and strong in construction as the boards of ordinary type.

In Figure 3, I have shown the board disassembled, the sections 7, 8, and9 being piled one upon another and the cleats 1 being disposedthereabove. I have also shown a T- square 20 which has a head 21 hingedthereto. The T-square can therefore be disposed between the cleats 1 andbe transported with the board.

In each of the ends of the cleats 1, I provide a bore 2-2 in which areadapted to be disposed drawing instruments, thumb tacks, erasers, etc.The bores 22 have covers 23 which are adapted to be disposed therein,thus effectually enclosing the content-s of the bores. The cleats 1 areprovided with rubber or felt pads 24; which are disposed on the underside thereof. These pads prevent the cleats from marring the surface ofthe article on which the board is disposed.

As heretofore stated, it will be apparent that this device is verysimple in construction, that it can be quickly and readily assembled ordisassembled, and can be packed into a very small space.

I claim:

1. A device of the type described comprising a board composed of threesections, the

end sections having recesses in one of their sides, transverse members,each having an arcuate groove therein and projections at the endsthereof, said projections being adapted to be received in the recessesof said end sections, whereby said end sections can only be moved towardeach other, and. means carried'by the center section and adapted to bereceived in said arcuate grooves for locking said section in place withrespect to said transverse members.

2. A device of the type described comprising a board composed of threesections, the end sections having recesses in one of their sides,transverse members, each having an arcuate groove therein andprojections at the ends thereof, said pro ectlons being adapted to bereceived in the recesses of said end sections, whereby said end sectionscan only be moved toward each other, and means carried by the centersection for locking said section in place with respect to saidtransverse members, said means comprising a strip pivotally secured tothe center board, the ends thereof being adapted to enter the arcuategrooves in said transverse members.

3. A device of the type described comprising a board composed of threesections, the end sections having recesses in one of their sides,transverse members, each having an arcuate groove therein and aprojection at the ends thereof, pins carried by said transverse members,said projections being adapted to be received in the recesses of saidend sections, whereby said end sections can only be moved toward eachother. and means carried by the center section for locking said sectionin place with respect to said transverse members, said means comprisingsaid pins which are adapted to be received in openings in said centersection, and a strip pivotally secured to the center board. the endsthereof being adapted to enter the arcuate grooves in said transversemen'ibers.

i. A drawing board comprising a plurality of sections capable of beingassembled edge to edge to provide a smooth surface, said end boardshaving recesses therein with tapered walls, transverse members havingprojections at the ends thereof and adapted to be received in saidrecesses, said projections having tapering walls, whereby said endboards are prevented from outward, upward, or lateral movement withrespect to said transverse members, the contacting edges of said boardsbeing fashioned so as to hold each other in the same plane. saidtransverse members having arcuatie-shaped grooves, means for preventinglateral move ment of the central board with respect to said transversemembers. a spring strip operatively carried by said central board, saidarcuate-shaped grooves being adapted to receive the ends of said stripand to flex said strip so as to hold said central board in place,whereby said drawing board can be readily assembled or disassembledwithout the aid of tools.

